[mox1]

The problem with infinite, easy to create identities leads to a well researched attack, known as a Sybil[1] attack.

If there isn't some type of cost or friction to creating identities, you will have a lot of bad behavior, full stop. This has been shown time and time again, so it's basically a non-starter. I don't want to be part of any social network that has this feature (infinite identities), its going to eventually turn to shit or require intense moderation (or both!)

1. https://en.wikipedia.org/wiki/Sybil_attack

[hem777]

I think this is true if the system is global or there’s model where Sybil resistance is “here everyone, have an access to write to the database”. In a system like HN there’s value in Sybil resistance. On your Twitter feed, almost none.

So I disagree this is a non-starter, because we didn’t find a solution in the past, but rather an ideal place to start and a great space to discover new Sybil resistance mechanisms (which we have over the recent years).

[ryan29]

Domain based identity also enables attestation which could be use to artificially add even more friction. Plus, since it's not constrained to a single platform, you could have 3rd parties that assess trust and reputation.